How To Flash A Skylight On Roof

Drive roofing or flashing nails horizontally into the skylight not vertically into the roof.

How to flash a skylight on roof.

Secure by nailing the flashing to the roof. Repeat to install the flashing to all sides of the skylight frame. Custom flashing around a triangle skylight on a metal roof. Custom flashing around a triangle skylight on a metal roof.

Install the bottom flashing a single piece that wraps partway around the skylight and sits on top of the roof shingles figure 3. Next slip individual pieces of step flashing under the shingles. Finally the top flashing gets interwoven with the underlayment that covers the roof surface and the roofing material is added back around the skylight with a 2 4 inch gap between the top of the flashing and the bottom of the shingles. This skylight shows the correct flashing technique to make it waterproof.

Numbers 1 4 correspond to the 4 photos above. Demonstrating how to properly flash a skylight. Once the metal flashings are ready place the pieces between the roof and skylight above the roof and under the skylight. Step 3 install the metal flashing.

Then fold the tabs on all sides of the skylight and screw them down. Number 5 shows how the final step counterflashing is integral to the skylight and covers the upper edges of the roof flashing. Properly installing a skylight requires detailed skylight flashing. Some skylights come with a kit and you don t have to build the aprons and install step fl.